Update Learning-Environment-Design-Academy.md (#1653)

docs/Learning-Environment-Design-Academy.md

 * `Configuration` - The engine-level settings which correspond to rendering
   quality and engine speed.
   * `Width` - Width of the environment window in pixels.
-  * `Height` - Width of the environment window in pixels.
+  * `Height` - Height of the environment window in pixels.
   * `Quality Level` - Rendering quality of environment. (Higher is better)
   * `Time Scale` - Speed at which environment is run. (Higher is faster)
   * `Target Frame Rate` - FPS engine attempts to maintain.